LatticeFFT.h

Classes

LatticeFFT -- Functions for Fourier transforming Lattices (full description)

class LatticeFFT

Interface

Public Members
static void cfft2d(Lattice<Complex> & cLattice, const Bool toFrequency=True)
static void cfft(Lattice<Complex> & cLattice, const Vector<Bool> & whichAxes, const Bool toFrequency=True)
static void cfft(Lattice<Complex> & cLattice, const Bool toFrequency=True)
static void rcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Vector<Bool> & whichAxes, const Bool doShift=True, Bool doFast=False)
static void myrcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Vector<Bool> & whichAxes, const Bool doShift=True)
static void rcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Bool doShift=True, Bool doFast=False)
static void myrcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Bool doShift=True)
static void crfft(Lattice<Float> & out, Lattice<Complex> & in, const Vector<Bool> & whichAxes, const Bool doShift=True, Bool doFast=False)
static void crfft(Lattice<Float> & out, Lattice<Complex> & in, const Bool doShift=True, Bool doFast=False)
static void crfft(Lattice<Float> & out, const Lattice<Complex> & in, const Bool doShift=True, Bool doFast=False)

Description

Prerequisite

Etymology

Synopsis

Example


 


 
Motivation

 


 
To Do




Member Description


static void cfft2d(Lattice<Complex> & cLattice, const Bool toFrequency=True)

 2-D in-place complex->complex FFT. Transforms over the first two
 dimensions and iterates over all the others. The Lattice must have two or
 more dimensions otherwise and AipsError is thrown.

static void cfft(Lattice<Complex> & cLattice, const Vector<Bool> & whichAxes, const Bool toFrequency=True)



 N-D in-place complex->complex FFT. Only transform over selected
 dimensions. Iterate over the others. whichAxes must be the same length as
 the number of dimensions in the Lattice otherwise an AipsError is thrown.

static void cfft(Lattice<Complex> & cLattice, const Bool toFrequency=True)



 N-D in-place complex->complex FFT. Transform over all axes.

static void rcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Vector<Bool> & whichAxes, const Bool doShift=True, Bool doFast=False)



 N-D real->complex FFT. Only one half of the Hermition result is
 returned. Transforms are only done on selected dimensions. The origin of
 the transform is the center of the Lattice ie., [nx/2,ny/2,...] if
 doShift is True. Otherwise it is the first element ie., [0,0,...]

static void myrcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Vector<Bool> & whichAxes, const Bool doShift=True)


static void rcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Bool doShift=True, Bool doFast=False)



 N-D real->complex FFT. Only one half of the Hermition result is
 returned. Transform over all dimensions. The origin of
 the transform is the center of the Lattice ie., [nx/2,ny/2,...] if
 doShift is True. Otherwise it is the first element ie., [0,0,...]

static void myrcfft(Lattice<Complex> & out, const Lattice<Float> & in, const Bool doShift=True)



static void crfft(Lattice<Float> & out, Lattice<Complex> & in, const Vector<Bool> & whichAxes, const Bool doShift=True, Bool doFast=False)

static void crfft(Lattice<Float> & out, Lattice<Complex> & in, const Bool doShift=True, Bool doFast=False)

static void crfft(Lattice<Float> & out, const Lattice<Complex> & in, const Bool doShift=True, Bool doFast=False)




 N-D complex->real FFT. Only one half of the Hermition input is
 required. If whichAxis is specified Transforms are only done on selected
 dimensions otherwise they are done on all axes. The origin of the
 transform is the center of the Lattice ie., [nx/2,ny/2,...] if doShift is
 True, otherwise it is the first element ie., [0,0,...]  


 These functions will scramble the input Lattice unless the versions
 with const inputs are used. The const input versions are less efficient as
 they create a temporary Lattice and copy the input data into it.